earth vs hydrosphere

earth and hydrosphere both are nouns.

Word	Noun	Adjective	Verb	Adverb
earth	Yes	No	Yes	No
hydrosphere	Yes	No	No	No

earth (noun)	hydrosphere (noun)
a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage)	the watery layer of the earth's surface; includes water vapor
the concerns of this life as distinguished from heaven and the afterlife
the abode of mortals (as contrasted with Heaven or Hell)
the solid part of the earth's surface
the 3rd planet from the sun; the planet we live on
the loose soft material that makes up a large part of the land surface
once thought to be one of four elements composing the universe (Empedocles), associated with the humour black bile

earth (verb)	hydrosphere (verb)
connect to the earth
hide in the earth like a hunted animal